Need to Update default value in EFF using OM Extension

Summary:

In the Manage Order Extensible flexfield , for flexfield code DOO_HEADERS_ADD_INFO , one context was created PROGRESS_BILLING_INFO , which has default value as 'null' , when sales order gets created , that context PROGRESS_BILLING_INFO gets created in DOO_HEADERS_EFF_B table and column ATTRIBUTE_CHAR1 populated as null value . Although after 25C upgrade due to some cache issue , that EFF context not getting created in the DB for every sales order creation.

To overcome this need to create an OM extension that will create the flexfield context with default value in ATTRIBUTE_CHAR1 in DOO_HEADERS_EFF_B table. this extension should be applicable only once for sales order creation , not for revision.